Sales Tax Calculator for Canada and Quebec
This free sales tax calculator works out GST, QST, HST or PST instantly: enter an amount, choose your province, and the breakdown appears line by line, just like on a real receipt.
GST, QST and HST Calculator
Decimals with a period or a comma.
Calculation receipt
GST and QST calculated separately on the amount before tax.
How GST and QST are calculated in Quebec
Sales Tax Rates by Province and Territory in 2026
| Province or territory | Type | GST | Provincial tax | Combined rate |
|---|---|---|---|---|
| Quebec | GST + QST | 5% | 9.975% | 14.975% |
| Ontario | HST | n/a | n/a | 13% |
| Nova Scotia | HST | n/a | n/a | 14% |
| New Brunswick | HST | n/a | n/a | 15% |
| Prince Edward Island | HST | n/a | n/a | 15% |
| Newfoundland and Labrador | HST | n/a | n/a | 15% |
| British Columbia | GST + PST | 5% | 7% | 12% |
| Manitoba | GST + RST | 5% | 7% | 12% |
| Saskatchewan | GST + PST | 5% | 6% | 11% |
| Alberta | GST only | 5% | n/a | 5% |
| Yukon | GST only | 5% | n/a | 5% |
| Northwest Territories | GST only | 5% | n/a | 5% |
| Nunavut | GST only | 5% | n/a | 5% |
In HST provinces, the 5% federal share is already folded into the single rate: it isn't billed separately.
How to Calculate Sales Tax on an Amount
Calculating sales tax comes down to one operation: multiply the price before tax by the rate in effect in your province, then add the result to the starting amount. The sales tax calculator above chains these two steps automatically, but the formula is still worth knowing to check an invoice by hand.
The basic formula
To calculate sales tax on an amount, apply:
Tax = price before tax × rate
Total = price before tax + tax
A $100.00 item in Ontario, where HST is 13%, gives $100.00 × 0.13 = $13.00 in tax, for a total of $113.00. The same tax calculation in Alberta, where only the 5% GST applies, gives $5.00 and a total of $105.00. The rate changes from province to province; the method never does.
Working backwards from a tax-included price
When the sticker price already includes tax, divide instead of multiplying: divide the total by 1 plus the rate. A $114.98 total in Quebec gives back $114.98 ÷ 1.14975 = $100.00 before tax. The “Price with tax included” toggle applies this formula, as does the dedicated reverse sales tax calculator.
Checking a tax calculation in three lines
Rounding: where one-cent gaps come from
Each tax is rounded separately to the nearest cent, and the rounded amounts are then added together. Calculating everything at once with the combined rate can therefore land a cent away from the amount printed on an official invoice. This calculator reproduces the line-by-line rounding used on real receipts, which is why the total above reads $14.98 rather than $14.975.
Sales Tax in Quebec: 5% GST and 9.975% QST
Quebec is the only province where two separate taxes appear on the same receipt. Calculating sales tax in Quebec means adding the federal GST of 5% to the provincial QST of 9.975%, each applied to the price before tax. Select “Quebec” in the calculator above and both lines show up separately, just as they would on an invoice.
Why the combined rate is 14.975%, not 15.47%
Until 2012, QST was calculated on the price plus GST already added: a tax on a tax. Since January 1, 2013, the two taxes apply independently to the same base amount. The combined rate is therefore the simple sum 5% + 9.975% = 14.975%. Applying QST on a price already marked up by GST would give 1.05 × 1.09975 = 15.47%, or $4.99 too much on a $1,000 purchase. A little-known fact: before 2013, the old 9.5% QST rate applied on top of the GST-included price, and the result was exactly the same (1.05 × 1.095 = 1.14975). The reform changed the method, not the amount paid.
Isolating GST or QST separately
A self-employed worker or a registered business often needs to report the two taxes separately rather than as a combined rate. The receipt above already splits each line; for the detailed method, see calculating GST or QST on their own and the article on self-employed invoicing.
Frequently Asked Questions About Sales Tax
What is the sales tax rate in Quebec in 2026?
The combined rate is 14.975%: the federal GST of 5% plus Quebec's QST of 9.975%, each calculated on the price before tax. On $100.00, that works out to $5.00 in GST, $9.98 in QST, and a total of $114.98.
Does each tax get rounded separately?
Yes. Each tax is rounded to the nearest cent, and the rounded amounts are then added together. Calculating everything at once with the combined rate can be a cent off the amount printed on an actual receipt. This calculator reproduces the line-by-line rounding used on real invoices.
Does the calculator cover every Canadian province and territory?
Yes, all thirteen provinces and territories are covered, across the four systems in use: GST only, GST plus QST in Quebec, HST in five harmonized provinces, and GST plus a separate provincial sales tax in British Columbia, Manitoba and Saskatchewan.
How do I work out the price before tax from a tax-included total?
Divide, don't subtract: divide the total by 1 plus the province's combined tax rate. In Quebec, $114.98 ÷ 1.14975 gives back $100.00. Subtracting 14.975% from the total would give too low a result. The “Price with tax included” toggle and the reverse calculator apply the correct formula.
Before You Use the Result
The amounts shown are an estimate provided for informational purposes. Some goods and services are zero-rated or exempt (basic groceries, prescription drugs, printed books, children's clothing, financial services) and don't follow your province's combined rate. Special rules also apply to lodging, alcohol, used vehicles and interprovincial sales. Buying real estate also triggers a land transfer tax (Quebec's “welcome tax”), a separate calculation from sales tax.
CalculatriceTaxes.ca is an independent site. It is not affiliated with the Canada Revenue Agency, Revenu Québec, or any provincial government. For a tax decision or an official filing, consult government sources or a professional.